EXPLANATORY INDEX. 



283 



Obtusa, (lacinia) when rounded 

 and not produced into a promi- 

 nent or active form, 163 



Ocelli, simple eyes of insects, 155; 

 figured, 153, three black spots 



Octoon, the eighth segment of in- 

 sects, 145; figured, 137, O 



Oculi, the compound eyes of in- 

 sects, 158; figured 153, GE 



(Esophagus, the anterior extremity 

 of the alimentary canal, 185 



CEstrites, an order of Diptera, 222 



Olivarius, dull olive green or green 

 with brown in it, 174 



Organs of insects, general sum- 

 mary of the, 194 



Orthoptera, the fifth class of in- 

 sects, having the first pair of 

 wings leathery, the second mem- 

 branous; the mouth furnished 

 with strong mandibles, meeting 

 transversely, 77; mode of col- 

 lecting, 105; classification, 264 



Oryssites, an order of Hymenop- 

 tera, 242 



Os or mouth of insects described, 

 159 ; figured, 159 



Osmiites, an order of Hymenop- 

 tera, 234 



Ovipositor of female insects, an 

 appendage of the telum, 171 



Ovum or egg of insects laid by the 

 parent, 2; figured,17,a,and25,a 



Painted-winged flies, Anthracites, 

 an order of Diptera, 221 



Palpi, appendages of the maxillae 

 and labium of insects, 1 60, 163 ; 

 figured, 159, 6 h, 161, 6 A 



Palpifer of maxillae, its third piece 

 distinguished by bearing the 

 maxillary feelers, 162 ; figured, 

 159, o 3 



Palpifonnis, (galea) when it is dis- 

 tinct from the lacinia and com- 

 posed of several cyl indrical j oints 

 like those of antennae or palpi, 

 163; figured, 159, o; (ligula) is 

 bilobed or quadrilobed, the lobes 

 being jointed in the manner of 

 feelers, 161 ; figured, 159, u 4 



Palpiger of labium, its third por- 

 tion bearing the labial feelers, 

 160; figured, 159, u 3, 161, u 3 



Panorpites, an order of Neurop- 

 tera, 270 



Panurgites, an order of Hyme- 

 noptera, 235 



Papilionites, an order of Lepidop- 

 tera,211 



Paraglossce, the short lateral lobes 

 of a setiform ligula, 161 



Paratelum, the twelfth segment of 

 insects, 146; figured, 137, W 



Peacock butterfly, figured, 112 



Pearl-flies, Perlites, an order of 

 Neuroptera, 268 



Pearl-moths, Pyralites, an order 

 of Lepidoptera, 214 



Pectiniformes, (antennas) when the 

 joints are furnished on one side 

 with slender processes resem- 

 bling the teeth of a comb, 156 ; 

 figured, 156,7 



Pedunculated insects, are so called 

 when they have the sixth seg- 

 ment or podeon slender and 

 thread-like, as the wasp, &c., 

 145 



Perforatae, (antennae) when a por- 

 tion of each joint is dilated and 

 flattened, and the remaining 

 portion being cylindrical, ap- 

 pears like a thread on which the 

 dilated parts are strung, 158 



Perlites, order of Neuroptera, 268 



Petiolatus, the English- Latin word 

 for p etiolate, 129 



Phalaenites, an order of Lepidop- 

 tera, 212 



Pharynx or throat of insects, 159 



Phasma, figured to illustrate the 

 segments, 138 



Phorites, an order of Diptera, 228 



Phryganiites, an order of Neurop- 

 tera, 269 



Phyllo3cus, a genus of Cephites, 

 figured, 245 



Physiology of insects, 133 



Phytometrites, an order of Lepi- 

 doptera, 211 



Phytoinyzites, an order of Diptera 

 228 



Piceus, the colour of pitch, 173 



Piercing-flies, Stomoxites, an or- 

 der of Diptera, 221 



Pill-beetles, Byrrhites, an order of 

 Coleoptera, 252 



